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package com.oracle.truffle.llvm.runtime.debug.debugexpr.nodes;

import com.oracle.truffle.api.dsl.Cached;
import com.oracle.truffle.api.dsl.Specialization;
import com.oracle.truffle.api.profiles.BranchProfile;
import com.oracle.truffle.llvm.runtime.LLVMLanguage;
import com.oracle.truffle.llvm.runtime.datalayout.DataLayout;
import com.oracle.truffle.llvm.runtime.debug.debugexpr.parser.DebugExprException;
import com.oracle.truffle.llvm.runtime.debug.debugexpr.parser.DebugExprType;
import com.oracle.truffle.llvm.runtime.nodes.api.LLVMExpressionNode;
import com.oracle.truffle.llvm.runtime.types.Type.TypeOverflowException;

public abstract class DebugExprSizeofNode extends LLVMExpressionNode {

    private final long typeSize;

    public static DebugExprSizeofNode create(DebugExprType type) throws TypeOverflowException {
        DataLayout datalayout = LLVMLanguage.get(null).getDefaultDataLayout();
        return DebugExprSizeofNodeGen.create(type.getLLVMRuntimeType().getSize(datalayout));
    }

    DebugExprSizeofNode(long typeSize) {
        this.typeSize = typeSize;
    }

    @Specialization
    public long getSize(@Cached BranchProfile exception) {
        if (typeSize < 0) {
            exception.enter();
            throw DebugExprException.create(this, "Error while finding type size");
        }
        return typeSize;
    }

}
